How severe is CVE-2020-35124?

CVE-2020-35124 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-35124 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35124?

CVE-2020-35124 affects Acquia Mautic. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35124?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-35124 published?

CVE-2020-35124 was published on 2021-01-28 and last updated on 2026-06-17.

CVE-2020-35124

CVE-2020-35124 is a critical-severity vulnerability in Acquia Mautic with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v2: 6.8
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Acquia Mautic
Published: 2021-01-28
Last modified: 2026-06-17

Description

A cross-site scripting (XSS) vulnerability in the assets component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript through the Referer header of asset downloads.

Frequently asked questions

What is CVE-2020-35124?: A cross-site scripting (XSS) vulnerability in the assets component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript through the Referer header of asset downloads.
How severe is CVE-2020-35124?: CVE-2020-35124 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-35124 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35124?: CVE-2020-35124 affects Acquia Mautic. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35124?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-35124 published?: CVE-2020-35124 was published on 2021-01-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:acquia:mautic:*:*:*:*:*:*:*:*

More vulnerabilities in Acquia Mautic

CVE-2022-25772 — Critical (CVSS 9.6): A cross-site scripting (XSS) vulnerability in the web tracking component of Mautic before 4.3.0 allows remote attackers…
CVE-2020-35125 — Critical (CVSS 9.6): A cross-site scripting (XSS) vulnerability in the forms component of Mautic before 3.2.4 allows remote attackers to…
CVE-2024-47051 — Critical (CVSS 9.1): This advisory addresses two critical security vulnerabilities present in Mautic versions before 5.2.3. These…
CVE-2020-35128 — Critical (CVSS 9.0): Mautic before 3.2.4 is affected by stored XSS. An attacker with permission to manage companies, an application feature,…
CVE-2017-8874 — High (CVSS 8.8): Multiple cross-site request forgery (CSRF) vulnerabilities in Mautic 1.4.1 allow remote attackers to hijack the…
CVE-2022-25776 — High (CVSS 8.3): Prior to the patched version, logged in users of Mautic are able to access areas of the application that they should be…

All CVEs affecting Acquia Mautic →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →